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/**CFile****************************************************************
FileName [if.h]
SystemName [ABC: Logic synthesis and verification system.]
PackageName [FPGA mapping based on priority cuts.]
Synopsis [External declarations.]
Author [Alan Mishchenko]
Affiliation [UC Berkeley]
Date [Ver. 1.0. Started - November 21, 2006.]
Revision [$Id: if.h,v 1.00 2006/11/21 00:00:00 alanmi Exp $]
***********************************************************************/
#ifndef __IF_H__
#define __IF_H__
#ifdef __cplusplus
extern "C" {
#endif
////////////////////////////////////////////////////////////////////////
/// INCLUDES ///
////////////////////////////////////////////////////////////////////////
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <assert.h>
#include <time.h>
#include "vec.h"
#include "mem.h"
////////////////////////////////////////////////////////////////////////
/// PARAMETERS ///
////////////////////////////////////////////////////////////////////////
// the maximum size of LUTs used for mapping (should be the same as FPGA_MAX_LUTSIZE defined in "fpga.h"!!!)
#define IF_MAX_LUTSIZE 32
// the largest possible number of LUT inputs when funtionality of the LUTs are computed
#define IF_MAX_FUNC_LUTSIZE 15
// a very large number
#define IF_INFINITY 100000000
// the largest possible user cut cost
#define IF_COST_MAX ((1<<14)-1)
// object types
typedef enum {
IF_NONE, // 0: non-existent object
IF_CONST1, // 1: constant 1
IF_CI, // 2: combinational input
IF_CO, // 3: combinational output
IF_AND, // 4: AND node
IF_VOID // 5: unused object
} If_Type_t;
////////////////////////////////////////////////////////////////////////
/// BASIC TYPES ///
////////////////////////////////////////////////////////////////////////
typedef struct If_Man_t_ If_Man_t;
typedef struct If_Par_t_ If_Par_t;
typedef struct If_Lib_t_ If_Lib_t;
typedef struct If_Obj_t_ If_Obj_t;
typedef struct If_Cut_t_ If_Cut_t;
typedef struct If_Set_t_ If_Set_t;
// parameters
struct If_Par_t_
{
// user-controlable paramters
int nLutSize; // the LUT size
int nCutsMax; // the max number of cuts
int nFlowIters; // the number of iterations of area recovery
int nAreaIters; // the number of iterations of area recovery
float DelayTarget; // delay target
int fPreprocess; // preprossing
int fArea; // area-oriented mapping
int fFancy; // a fancy feature
int fExpRed; // expand/reduce of the best cuts
int fLatchPaths; // reset timing on latch paths
int fSeqMap; // sequential mapping
int fVerbose; // the verbosity flag
// internal parameters
int fAreaOnly; // area only mode
int fTruth; // truth table computation enabled
int fUsePerm; // use permutation (delay info)
int fUseBdds; // use local BDDs as a cost function
int fUseSops; // use local SOPs as a cost function
int fUseCnfs; // use local CNFs as a cost function
int fUseMv; // use local MV-SOPs as a cost function
int nLatches; // the number of latches in seq mapping
int fLiftLeaves; // shift the leaves for seq mapping
If_Lib_t * pLutLib; // the LUT library
float * pTimesArr; // arrival times
float * pTimesReq; // required times
int (* pFuncCost) (If_Cut_t *); // procedure to compute the user's cost of a cut
void * pReoMan; // reordering manager
};
// the LUT library
struct If_Lib_t_
{
char * pName; // the name of the LUT library
int LutMax; // the maximum LUT size
int fVarPinDelays; // set to 1 if variable pin delays are specified
float pLutAreas[IF_MAX_LUTSIZE+1]; // the areas of LUTs
float pLutDelays[IF_MAX_LUTSIZE+1][IF_MAX_LUTSIZE+1];// the delays of LUTs
};
// manager
struct If_Man_t_
{
// mapping parameters
If_Par_t * pPars;
// mapping nodes
If_Obj_t * pConst1; // the constant 1 node
Vec_Ptr_t * vCis; // the primary inputs
Vec_Ptr_t * vCos; // the primary outputs
Vec_Ptr_t * vObjs; // all objects
Vec_Ptr_t * vMapped; // objects used in the mapping
Vec_Ptr_t * vTemp; // temporary array
int nObjs[IF_VOID];// the number of objects by type
// various data
int nLevelMax; // the max number of AIG levels
float fEpsilon; // epsilon used for comparison
float RequiredGlo; // global required times
float RequiredGlo2; // global required times
float AreaGlo; // global area
int nNets; // the sum total of fanins of all LUTs in the mapping
int nCutsUsed; // the number of cuts currently used
int nCutsMerged; // the total number of cuts merged
unsigned * puTemp[4]; // used for the truth table computation
int SortMode; // one of the three sorting modes
int fNextRound; // set to 1 after the first round
int nChoices; // the number of choice nodes
// sequential mapping
Vec_Ptr_t * vLatchOrder; // topological ordering of latches
Vec_Int_t * vLags; // sequentail lags of all nodes
int nAttempts; // the number of attempts in binary search
int nMaxIters; // the maximum number of iterations
int Period; // the current value of the clock period (for seq mapping)
// memory management
int nTruthWords; // the size of the truth table if allocated
int nPermWords; // the size of the permutation array (in words)
int nObjBytes; // the size of the object
int nCutBytes; // the size of the cut
int nSetBytes; // the size of the cut set
Mem_Fixed_t * pMemObj; // memory manager for objects (entrysize = nEntrySize)
Mem_Fixed_t * pMemSet; // memory manager for sets of cuts (entrysize = nCutSize*(nCutsMax+1))
If_Set_t * pMemCi; // memory for CI cutsets
If_Set_t * pMemAnd; // memory for AND cutsets
If_Set_t * pFreeList; // the list of free cutsets
};
// priority cut
struct If_Cut_t_
{
float Delay; // delay of the cut
float Area; // area (or area-flow) of the cut
float AveRefs; // the average number of leaf references
unsigned uSign; // cut signature
unsigned Cost : 14; // the user's cost of the cut
unsigned fCompl : 1; // the complemented attribute
unsigned fUser : 1; // using the user's area and delay
unsigned nLimit : 8; // the maximum number of leaves
unsigned nLeaves : 8; // the number of leaves
int * pLeaves; // array of fanins
char * pPerm; // permutation
unsigned * pTruth; // the truth table
};
// set of priority cut
struct If_Set_t_
{
short nCutsMax; // the max number of cuts
short nCuts; // the current number of cuts
If_Set_t * pNext; // next cutset in the free list
If_Cut_t ** ppCuts; // the array of pointers to the cuts
};
// node extension
struct If_Obj_t_
{
unsigned Type : 4; // object
unsigned fCompl0 : 1; // complemented attribute
unsigned fCompl1 : 1; // complemented attribute
unsigned fPhase : 1; // phase of the node
unsigned fRepr : 1; // representative of the equivalence class
unsigned fMark : 1; // multipurpose mark
unsigned fVisit : 1; // multipurpose mark
unsigned Level : 22; // logic level of the node
int Id; // integer ID
int nRefs; // the number of references
int nVisits; // the number of visits to this node
int nVisitsCopy; // the number of visits to this node
If_Obj_t * pFanin0; // the first fanin
If_Obj_t * pFanin1; // the second fanin
If_Obj_t * pEquiv; // the choice node
float EstRefs; // estimated reference counter
float Required; // required time of the onde
float LValue; // sequential arrival time of the node
void * pCopy; // used for object duplication
If_Set_t * pCutSet; // the pointer to the cutset
If_Cut_t CutBest; // the best cut selected
};
static inline int If_ManCiNum( If_Man_t * p ) { return p->nObjs[IF_CI]; }
static inline int If_ManCoNum( If_Man_t * p ) { return p->nObjs[IF_CO]; }
static inline int If_ManAndNum( If_Man_t * p ) { return p->nObjs[IF_AND]; }
static inline int If_ManObjNum( If_Man_t * p ) { return Vec_PtrSize(p->vObjs); }
static inline If_Obj_t * If_ManConst1( If_Man_t * p ) { return p->pConst1; }
static inline If_Obj_t * If_ManCi( If_Man_t * p, int i ) { return (If_Obj_t *)Vec_PtrEntry( p->vCis, i ); }
static inline If_Obj_t * If_ManCo( If_Man_t * p, int i ) { return (If_Obj_t *)Vec_PtrEntry( p->vCos, i ); }
static inline If_Obj_t * If_ManLi( If_Man_t * p, int i ) { return (If_Obj_t *)Vec_PtrEntry( p->vCos, If_ManCoNum(p) - p->pPars->nLatches + i ); }
static inline If_Obj_t * If_ManLo( If_Man_t * p, int i ) { return (If_Obj_t *)Vec_PtrEntry( p->vCis, If_ManCiNum(p) - p->pPars->nLatches + i ); }
static inline If_Obj_t * If_ManObj( If_Man_t * p, int i ) { return (If_Obj_t *)Vec_PtrEntry( p->vObjs, i ); }
static inline int If_ObjIsConst1( If_Obj_t * pObj ) { return pObj->Type == IF_CONST1; }
static inline int If_ObjIsCi( If_Obj_t * pObj ) { return pObj->Type == IF_CI; }
static inline int If_ObjIsCo( If_Obj_t * pObj ) { return pObj->Type == IF_CO; }
static inline int If_ObjIsPi( If_Obj_t * pObj ) { return If_ObjIsCi(pObj) && pObj->pFanin0 == NULL; }
static inline int If_ObjIsLatch( If_Obj_t * pObj ) { return If_ObjIsCi(pObj) && pObj->pFanin0 != NULL; }
static inline int If_ObjIsAnd( If_Obj_t * pObj ) { return pObj->Type == IF_AND; }
static inline If_Obj_t * If_ObjFanin0( If_Obj_t * pObj ) { return pObj->pFanin0; }
static inline If_Obj_t * If_ObjFanin1( If_Obj_t * pObj ) { return pObj->pFanin1; }
static inline int If_ObjFaninC0( If_Obj_t * pObj ) { return pObj->fCompl0; }
static inline int If_ObjFaninC1( If_Obj_t * pObj ) { return pObj->fCompl1; }
static inline void * If_ObjCopy( If_Obj_t * pObj ) { return pObj->pCopy; }
static inline void If_ObjSetCopy( If_Obj_t * pObj, void * pCopy ) { pObj->pCopy = pCopy; }
static inline void If_ObjSetChoice( If_Obj_t * pObj, If_Obj_t * pEqu ) { pObj->pEquiv = pEqu; }
static inline If_Cut_t * If_ObjCutBest( If_Obj_t * pObj ) { return &pObj->CutBest; }
static inline unsigned If_ObjCutSign( unsigned ObjId ) { return (1 << (ObjId % 31)); }
static inline float If_ObjArrTime( If_Obj_t * pObj ) { return If_ObjCutBest(pObj)->Delay; }
static inline void If_ObjSetArrTime( If_Obj_t * pObj, float ArrTime ) { If_ObjCutBest(pObj)->Delay = ArrTime; }
static inline float If_ObjLValue( If_Obj_t * pObj ) { return pObj->LValue; }
static inline void If_ObjSetLValue( If_Obj_t * pObj, float LValue ) { pObj->LValue = LValue; }
static inline void * If_CutData( If_Cut_t * pCut ) { return *(void **)pCut; }
static inline void If_CutSetData( If_Cut_t * pCut, void * pData ) { *(void **)pCut = pData; }
static inline int If_CutLeaveNum( If_Cut_t * pCut ) { return pCut->nLeaves; }
static inline unsigned * If_CutTruth( If_Cut_t * pCut ) { return pCut->pTruth; }
static inline int If_CutTruthWords( int nVarsMax ) { return nVarsMax <= 5 ? 1 : (1 << (nVarsMax - 5)); }
static inline int If_CutPermWords( int nVarsMax ) { return nVarsMax / sizeof(int) + ((nVarsMax % sizeof(int)) > 0); }
static inline float If_CutLutArea( If_Man_t * p, If_Cut_t * pCut ) { return pCut->fUser? (float)pCut->Cost : (p->pPars->pLutLib? p->pPars->pLutLib->pLutAreas[pCut->nLeaves] : (float)1.0); }
////////////////////////////////////////////////////////////////////////
/// MACRO DEFINITIONS ///
////////////////////////////////////////////////////////////////////////
#define IF_MIN(a,b) (((a) < (b))? (a) : (b))
#define IF_MAX(a,b) (((a) > (b))? (a) : (b))
// the small and large numbers (min/max float are 1.17e-38/3.40e+38)
#define IF_FLOAT_LARGE ((float)1.0e+20)
#define IF_FLOAT_SMALL ((float)1.0e-20)
#define IF_INT_LARGE (10000000)
// iterator over the primary inputs
#define If_ManForEachCi( p, pObj, i ) \
Vec_PtrForEachEntry( p->vCis, pObj, i )
// iterator over the primary outputs
#define If_ManForEachCo( p, pObj, i ) \
Vec_PtrForEachEntry( p->vCos, pObj, i )
// iterator over the primary inputs
#define If_ManForEachPi( p, pObj, i ) \
Vec_PtrForEachEntryStop( p->vCis, pObj, i, If_ManCiNum(p) - p->pPars->nLatches )
// iterator over the primary outputs
#define If_ManForEachPo( p, pObj, i ) \
Vec_PtrForEachEntryStop( p->vCos, pObj, i, If_ManCoNum(p) - p->pPars->nLatches )
// iterator over the latches
#define If_ManForEachLatchInput( p, pObj, i ) \
Vec_PtrForEachEntryStart( p->vCos, pObj, i, If_ManCoNum(p) - p->pPars->nLatches )
#define If_ManForEachLatchOutput( p, pObj, i ) \
Vec_PtrForEachEntryStart( p->vCis, pObj, i, If_ManCiNum(p) - p->pPars->nLatches )
// iterator over all objects, including those currently not used
#define If_ManForEachObj( p, pObj, i ) \
Vec_PtrForEachEntry( p->vObjs, pObj, i )
// iterator over logic nodes
#define If_ManForEachNode( p, pObj, i ) \
If_ManForEachObj( p, pObj, i ) if ( pObj->Type != IF_AND ) {} else
// iterator over cuts of the node
#define If_ObjForEachCut( pObj, pCut, i ) \
for ( i = 0; (i < (pObj)->pCutSet->nCuts) && ((pCut) = (pObj)->pCutSet->ppCuts[i]); i++ )
// iterator over the leaves of the cut
#define If_CutForEachLeaf( p, pCut, pLeaf, i ) \
for ( i = 0; (i < (int)(pCut)->nLeaves) && ((pLeaf) = If_ManObj(p, (pCut)->pLeaves[i])); i++ )
#define If_CutForEachLeafReverse( p, pCut, pLeaf, i ) \
for ( i = (int)(pCut)->nLeaves - 1; (i >= 0) && ((pLeaf) = If_ManObj(p, (pCut)->pLeaves[i])); i-- )
//#define If_CutForEachLeaf( p, pCut, pLeaf, i ) \
// for ( i = 0; (i < (int)(pCut)->nLeaves) && ((pLeaf) = If_ManObj(p, p->pPars->fLiftLeaves? (pCut)->pLeaves[i] >> 8 : (pCut)->pLeaves[i])); i++ )
// iterator over the leaves of the sequential cut
#define If_CutForEachLeafSeq( p, pCut, pLeaf, Shift, i ) \
for ( i = 0; (i < (int)(pCut)->nLeaves) && ((pLeaf) = If_ManObj(p, (pCut)->pLeaves[i] >> 8)) && (((Shift) = ((pCut)->pLeaves[i] & 255)) >= 0); i++ )
////////////////////////////////////////////////////////////////////////
/// FUNCTION DECLARATIONS ///
////////////////////////////////////////////////////////////////////////
/*=== ifCore.c ===========================================================*/
extern int If_ManPerformMapping( If_Man_t * p );
extern int If_ManPerformMappingComb( If_Man_t * p );
/*=== ifCut.c ============================================================*/
extern float If_CutAreaDerefed( If_Man_t * p, If_Cut_t * pCut, int nLevels );
extern float If_CutAreaRefed( If_Man_t * p, If_Cut_t * pCut, int nLevels );
extern float If_CutDeref( If_Man_t * p, If_Cut_t * pCut, int nLevels );
extern float If_CutRef( If_Man_t * p, If_Cut_t * pCut, int nLevels );
extern void If_CutPrint( If_Man_t * p, If_Cut_t * pCut );
extern void If_CutPrintTiming( If_Man_t * p, If_Cut_t * pCut );
extern float If_CutFlow( If_Man_t * p, If_Cut_t * pCut );
extern float If_CutAverageRefs( If_Man_t * p, If_Cut_t * pCut );
extern int If_CutFilter( If_Set_t * pCutSet, If_Cut_t * pCut );
extern void If_CutSort( If_Man_t * p, If_Set_t * pCutSet, If_Cut_t * pCut );
extern int If_CutMerge( If_Cut_t * pCut0, If_Cut_t * pCut1, If_Cut_t * pCut );
extern void If_CutLift( If_Cut_t * pCut );
extern void If_CutCopy( If_Man_t * p, If_Cut_t * pCutDest, If_Cut_t * pCutSrc );
extern void If_ManSortCuts( If_Man_t * p, int Mode );
/*=== ifMan.c =============================================================*/
extern If_Man_t * If_ManStart( If_Par_t * pPars );
extern void If_ManStop( If_Man_t * p );
extern If_Obj_t * If_ManCreateCi( If_Man_t * p );
extern If_Obj_t * If_ManCreateCo( If_Man_t * p, If_Obj_t * pDriver, int fCompl0 );
extern If_Obj_t * If_ManCreateAnd( If_Man_t * p, If_Obj_t * pFan0, int fCompl0, If_Obj_t * pFan1, int fCompl1 );
extern void If_ManCreateChoice( If_Man_t * p, If_Obj_t * pRepr );
extern void If_ManSetupCutTriv( If_Man_t * p, If_Cut_t * pCut, int ObjId );
extern void If_ManSetupCiCutSets( If_Man_t * p );
extern If_Set_t * If_ManSetupNodeCutSet( If_Man_t * p, If_Obj_t * pObj );
extern void If_ManDerefNodeCutSet( If_Man_t * p, If_Obj_t * pObj );
extern void If_ManDerefChoiceCutSet( If_Man_t * p, If_Obj_t * pObj );
extern void If_ManSetupSetAll( If_Man_t * p );
/*=== ifMap.c =============================================================*/
extern void If_ObjPerformMappingAnd( If_Man_t * p, If_Obj_t * pObj, int Mode, int fPreprocess );
extern void If_ObjPerformMappingChoice( If_Man_t * p, If_Obj_t * pObj, int Mode, int fPreprocess );
extern int If_ManPerformMappingRound( If_Man_t * p, int nCutsUsed, int Mode, int fPreprocess, char * pLabel );
/*=== ifReduce.c ==========================================================*/
extern void If_ManImproveMapping( If_Man_t * p );
/*=== ifSeq.c =============================================================*/
extern int If_ManPerformMappingSeq( If_Man_t * p );
/*=== ifTime.c ============================================================*/
extern float If_CutDelay( If_Man_t * p, If_Cut_t * pCut );
extern void If_CutPropagateRequired( If_Man_t * p, If_Cut_t * pCut, float Required );
/*=== ifTruth.c ===========================================================*/
extern void If_CutComputeTruth( If_Man_t * p, If_Cut_t * pCut, If_Cut_t * pCut0, If_Cut_t * pCut1, int fCompl0, int fCompl1 );
/*=== ifUtil.c ============================================================*/
extern void If_ManCleanNodeCopy( If_Man_t * p );
extern void If_ManCleanCutData( If_Man_t * p );
extern void If_ManCleanMarkV( If_Man_t * p );
extern float If_ManDelayMax( If_Man_t * p, int fSeq );
extern void If_ManComputeRequired( If_Man_t * p );
extern float If_ManScanMapping( If_Man_t * p );
extern float If_ManScanMappingSeq( If_Man_t * p );
extern void If_ManResetOriginalRefs( If_Man_t * p );
extern int If_ManCrossCut( If_Man_t * p );
#ifdef __cplusplus
}
#endif
#endif
////////////////////////////////////////////////////////////////////////
/// END OF FILE ///
////////////////////////////////////////////////////////////////////////
|
